# iHarmonizer vs FNam FFT Spectrogram Analyzer

The clearest difference is in-app purchases: FNam FFT Spectrogram Analyzer at none against iHarmonizer's 5. FNam FFT Spectrogram Analyzer also leads on update cadence (fortnightly vs every 3 months). iHarmonizer's advantage is iOS requirement (13.0 vs 18.0). On price, ads and device support there is nothing between them.

Both are free to download. iHarmonizer sells 5 one-off in-app purchases. FNam FFT Spectrogram Analyzer asks for nothing beyond the download.

iHarmonizer ships an update every 3 months, FNam FFT Spectrogram Analyzer fortnightly. The most recent releases landed on October 16, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | iHarmonizer | FNam FFT Spectrogram Analyzer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/iharmonizer/id488536254/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 months | **Fortnightly** |
| Monetization | Free with in-app purchases | — |
| Size | 98 MB | 4 MB |
| Requires iOS | **13.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 12+ |
| Developer | [Manufacturing Laboratories, Inc.](https://appshunter.io/developer/488536257) | [YEON SEOB KIM](https://appshunter.io/developer/1878586254) |

## What reviewers say

### iHarmonizer

[App page](https://appshunter.io/ios/app/iharmonizer/id488536254)

Record machining noise, save files, and send for free evaluation. An in-app purchase allows for immediate, on-site analysis to detect chatter and suggest optimal spindle speeds.

**Highlights:** Record machining noise, Save audio files, Free MLI evaluation, In-app purchase for immediate analysis, Chatter detection, Suggests alternate spindle speeds, Indicates no stable spindle speed

**Features:** macOS Compatibility

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Regulations 10 Pack | $24.99 | one-time |
| Regulations 50 Pack | $99.99 | one-time |
| Regulations 100 Pack | $99.99 | one-time |
| Regulations 200 Pack | $299.99 | one-time |
| Regulations 500 Pack | $299.99 | one-time |


### FNam FFT Spectrogram Analyzer

[App page](https://appshunter.io/ios/app/fnam-fft-spectrogram-analyzer/id6759438376)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is iHarmonizer free?

iHarmonizer is free to download, with in-app purchases available.

### Is FNam FFT Spectrogram Analyzer free?

FNam FFT Spectrogram Analyzer is free to download, with no in-app purchases.

### Do iHarmonizer or FNam FFT Spectrogram Analyzer have ads?

Neither iHarmonizer nor FNam FFT Spectrogram Analyzer shows ads.

### Which is updated more often, iHarmonizer or FNam FFT Spectrogram Analyzer?

iHarmonizer ships an update every 3 months, and FNam FFT Spectrogram Analyzer fortnightly. Most recently, iHarmonizer was updated on October 16, 2026 and FNam FFT Spectrogram Analyzer on October 11, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*